Cutter-head



G. A. ANDERSON.

' CUTTER HEAD. APPUCATLON FILED AuG.14. 1918.

Patented J an. 6, 1920.

' Svi/ventot- GustafAAnderson @27.1 rm

2 SHEETS-SHEET I4 UNiTEn sTATEs PATENT onirica.

GUSTAF ARVID ANDERSON, OF WAYNESBORQ, PENNSYLVANIA, ASSIGIOR TQ LNBIS MACHINE COMPANY, OF WAYNESBOBO, PENNSYLVANIA, A CORPORATION 0F PENN- SYLVANXA.

CUTTER-HEAD.

Specification of Letters Patent. i

Patented Janc 6, 1920.

Applicationled August 14, 1918. Serial 110.249,894.

Cutter-Heads, of which the following is a specilication.

My said invention consists 1n certain'improvenients in the details and construction and arrangement of parts of cutter-heads of that particular type illustrated in Patent No. 1,289,721, granted December 31, 1918,"

on the application' of Henry L. Fisher, whereby improved efficiency in the supports for the cutter or chaser holding slides is provided and other advantaffes inoperat-ion and result insured, all of which will be hereinafter more fully described and claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, y

' Figure l is a face view of a cutter-head, of the type referred to, the right hand portion of the view showin the cutter-head complete and the left-han portion showing the cam ring and the retaining ring broken away and the cutter holdin slides removed, big. 2, a perspective vie of one of the cutter holding slides, i

Fig. 3 a detail cross section on the dotted Fig. l1, a detailcross section on the dotted line 4-4 in Fig. 1,

Fig. 5, a detail cross section on the dotted line 5 5 in Fig. 1, and I Fig. 6 a detail on the dotted line (i1-6in In said drawings the portions marked A 'represent the body of the cutter-head, B

more ful-ly described) on the face of said body A and is adapted tooscillate thereon, Abeing held in position by a'retaining ring 11 set in'to a recess formed partly inthe body A- and partly in the ring B and seholding slides.

position by numerous screws 30 as grooves 1.2 in its underface corresponding .r

in number to the numberl of cutter o r chaser series of grooves 18, six bein shown, which extend in a direction tangential to the work, or with the adjacent 'grooves at an angle lto the other which is less than a right angle.

Each ofv said grooves is formed with stepped sides and has flat plates or gibs 14 secured on its opposite sides. on top of the ledges or steps a distance abov'e its bottom, the inner edges of said gibs overhanglng the bottoms of the grooves. These gibs Body A isn formed witha" are securedon the seats thus formed by means of screws 15 extending through from the back side ofthe head and engaging with screw-threaded perforations in said gibs.

The cutter holding slides Chave cutters or chasers c secured thereon in a mannerv clearly illustrated in Fig. 2 and common with the Landis type of cutter-head. Each cutter-holder is L-shaped consisting of a long base with an off-set' and appropriv ately formed head to afford the necessary support f'r the cutter .adapted to bear against abutments on the body. Its under side is formed in the'form of a T, or with a. channel in each side forming `two flanges on each side, the base flanges 16 being much narrower than the outer'lianges 17. Said holders. fit in grooves in the body with the head of the T formed by the flanges 16 engaging the bottom surf-ace R of the ways in the headbody and the opposing faces ofl 1 gibsll.-A Clearance is arranged for between the other faces of gibs 14 and the la-r ve fiange '17, so that after slight wear t e steps can be scraped 0H, thus restoring the fit between flanges 16 and their grooves.

Each of said cutter-holders has a pin 18 which engages pivotallywith a slidingblock l 19 mounted in one of the cam'grooves 12 of the cam ring B.

Said cam ring B has a projection 2O on.

pivoted thereon. .A bell-crank lever 25 is mounted on pivot j26 in the 'lug 10 on one edge in which is -formed a segmental i 'slo't'21i, apivot-pin 22 is clamped in saidv slot by meansof a nut vand a 'link 24 is 105` the frame Aan'd is hinged by a pintle 27 i to the end'ofsaid link 24. It will thus be 'seen that the swinging of lever 25 will os;

I ots 18 with the jacent corner of the adjacent slide is adapted with the leading e shown, with its outer to standv when the die is closed, as in the Fisher patent above referred to, thus permitting of a larger number-of cutters to the die-head and the use of the tangential form of cutter or chaser. N j

The body A is provide-d with a cylindrical axial projection 28 on its face which serves as a. journal or bearing for the-cam ring B. It is cut into sections by the grooves 13, which cut through ring into segmental sections or .abutment blocks against which said cam ring bears and by'which it is supported. The outer faces of....said VYabutment blocks are flush j faces of the chasers, (see Fig.` 5). As the serrationv in the Chaser next to its face does the main cutting, the force applied at this point is'the greatest and causes the greatest strain both in atangential and radial direction. The particular construction shown andl described whereby the cutter holding blocks are supported against this strain both by Athe abutment blocks and the particular arrangement of grooves results in a largely increased eiithe operation of the die and oonciency in w u leading feature of my said invenstitutes a tion.I

The retaining ring body of the cam VVring 11 is sunkinto the head lB and body A, as

outer faces of said parts and is provided with concentric arcuate projections 29 eX- tending into the spaces between the abutj V`,ment blocks 28 just inside but not forming a continuation of the cam ring bearing.v

These projections form closures between the abutment blocks 28 bearing upon the surface M of stem of chaser holding slide and thus prevent dust and chips from entering the cam bearings but do not serve as any part of the journal for the cam annulus B which is furnished by the abutrnentsl 28 as above described.

In work of the character for which this die head is particularly intended unusual strain, both in radial and tangential directions, comes upon the cutters and is transmitted to the cutter-holders and the cutter lsupported on it, thus dividing said face flush with the` holding supports. In the construction heretoforeemployed more or less binding and resulting trouble has been experienced. By the construction herein shown and described, wherein the base of each holder is the body by a tongue and groove connection with its ways, and the face of one side of the cutter holding end is supported against a rigid abutment in line with its leading serration, of cutting edge, these troubles are overcome and a very efficient and durable cutter-head for the purpose provided.

AHaving thus fully described my said inventionv what I claim as new and desire by Letters Patent, is;

1. A cutter head having a groove formed therein with an underlying narrower groove, a chaser holder having a body proportioned for sliding fit within the groove and a T- rib proportioned lyin groove, and gibs rigidly secured within the groove and roportioned for sliding fit between the bo y and the Trib.

2. A cutter head having a groove formed therein with an underlying narrower groove, a Chaser holder having a body proportioned for sliding fit in the under- Yist for sliding fit within the groove and a T-rib tioned for sliding fit-between the body and vthe T-rib, and screws inserted from the face ofl` the head opposite the groove and terminating in and rigidly securing the gibs.

el. Alcutterhead having a groove formed therein with an underlying narrower groove, a Chaser holder having a body proportioned for sliding fit within the groove and a T- rib proportioned for sliding fit within the underlying groove, removable gibs bearing upon and retaining the T-rib and slidably supporting the body, and screws inserted from the face of the head opposite the groove and terminating in and rigidly secur ing the gibs.

n witness whereof I have hereunto set my hand and seal at Waynesboro, VPennsylvania, this 8th day of August, A. D. nineteen hundred and eighteen.

G'USTAF ARVID ANDERSON. [LI 8.]

Witnesses:

J. G. BENnDro'r.'

ALF. N. RUSSELL. 

